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Potassium (Z = 19) has three primary isotopes: K-39, K-40, and K-41. 1) The half-li fe of K-40 is 1.248 × 109 years. Determine the age of a sample, in years, that once contained 820 Ci but now has 205 Ci.

Potassium (Z = 19) has three primary isotopes: K-39, K-40, and K-41. 1) The half-li fe of K-40 is 1.248 × 109 years. Determine the age of a sample, in years, that once contained 820 Ci but now has 205 Ci.

Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter9: Nuclear Chemistry
Section: Chapter Questions
Problem 9.15P
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Potassium (Z = 19) has three primary isotopes: K-39, K-40, and K-41.

1) The half-li fe of K-40 is 1.248 × 109 years. Determine the age of a sample, in years, that once contained 820 Ci but now has 205 Ci.

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